Wall formwork with sealing system

ABSTRACT

A wall formwork with a sealing system, in particular for closing an anchor hole of the wall formwork or for sealing an anchor rod in an anchor hole of the wall formwork, which comprises an anchor seal and a closure cap, and which is made in such a way that the anchor seal and the closure cap can be detachably connected to the anchor hole or an adapter providing the anchor hole. By means of the invention, it can be made possible that one or more anchor seals and closure caps of the sealing system can be particularly easily removed from the wall formwork and re-used, and that a particularly small maintenance expenditure for the wall formwork can be achieved.

The invention relates to a wall formwork with a sealing system for an anchor system.

A wall formwork comprises a formwork facing on the front and elements supporting the formwork facing on the back, such as longitudinal beams, crossbars and frames. The two sides of a wall to be concreted are delimited by wall formworks. The front of each wall formwork in that case adjoins the concrete. Wall formworks facing each other are generally retained by a plurality of anchor systems.

Usually, the two ends of an anchor rod of an anchor system comprise threads, onto which nuts are screwed as anchor fixing members. The middle region of an anchor rod, to which concrete can adjoin during concreting, in many cases comprises either a smooth surface or is enveloped by at least a sleeve or a sheathing tube having a smooth surface. The effective length of the anchor rod, and thus the thickness of the wall to be concreted, is determined thereby. The anchor rod is then mounted in such a way that a smooth surface thus provided is located between the fronts of the wall formwork.

The anchor rods are pushed through openings in the wall formwork, i.e. the anchor holes, and attached at their ends to the elements supporting the respective formwork facing in such a way that at least the tensile force acting upon the anchor rods during concreting is absorbed.

Document DE 10 2009 010 722 A1 discloses a wall formwork with a sealing sleeve which comprises a predetermined breaking point for dismantling. A worn sealing sleeve is detached from the wall formwork by fracturing it at the predetermined breaking point. On its inner face, the sealing sleeve comprises a seal. The seal comprises a sealing ring which narrows the opening around an anchor rod in such a way that no concrete can bleed out.

Document DE 10 2010 011 173 A1 discloses a sealing assembly for a wall formwork anchor with an outer sleeve and an inner sleeve. The outer sleeve is positively secured in the wall formwork panel opening, and the inner sleeve with the seal is accommodated in a loss-proof manner in the outer sleeve. By means of a flexible seal, the sealing assembly is capable of adapting to different wall formwork anchor diameters or to acentrically inserted wall formwork anchors, so that no different sealing assemblies have to be kept in storage for different wall formwork anchors. In the event of damage to the sealing assembly, an opening edge is sheared off by means of a knock-out bolt or knock-out tube.

It is the object of the invention to provide a wall formwork with a sealing system for an anchor system that is developed further.

The object of the invention is achieved by a wall formwork with a sealing system having the features of the first as well as the second claim and a method having the features of the co-ordinated claim. Advantageous embodiments are apparent from the dependent claims.

The wall formwork with a sealing system according to the invention, in particular for closing an anchor hole of the wall formwork or for sealing an anchor rod in an anchor hole of the wall formwork, comprises at least one anchor seal and at least one closure cap, both of which can be connected to the anchor hole.

An anchor seal serves for narrowing an anchor hole so that no concrete can bleed out in the case of an anchor rod pushed through the anchor hole. Liquid concrete is thus prevented from being able to penetrate into the wall formwork.

A closure cap can close the opening of an anchor hole of a wall formwork in such a way that no concrete can bleed out.

Detachable means non-destructively demountable. Thus, if a predetermined breaking point must first be fractured or a seal sheared off for dismounting, this does not constitute detachability within the sense of the present invention.

Compared with the prior art, the wall formwork with a sealing system according to the invention is advantageous in that the one or more anchor seals and closure caps of the sealing system can be particularly easily removed from the wall formwork and re-used.

Another advantage of the wall formwork with a sealing system according to the invention is that all anchor holes of the wall formwork, with particularly little effort, can be prepared or converted for a different anchor system that requires a specially adapted anchor seal for sealing.

Moreover, the wall formwork with a sealing system according to the invention makes it possible that, without any additional effort worth mentioning, the decision of which anchor holes of the wall formwork are to be used for attaching anchor systems can be left to when the hollow form provided by the wall formworks is constructed, and that a high level of flexibility can thus be achieved.

In one embodiment of the invention, the closure cap is made so as to be directly connectable to the anchor hole.

Directly connected to the anchor hole means that no further component is provided between the closure cap and the anchor hole. An indirect connection would be provided if the closure cap were connected to the anchor seal, provided the anchor seal is connected to the anchor hole.

In principle, the anchor seal can be directly connected to the anchor hole.

A closure cap that can be directly connected to the anchor hole is advantageous in that fewer interfaces, i.e. transitions between two components, adjoin the concrete, and that thus, the risk of leakage can be reduced. Furthermore, providing few interfaces on the side of the formwork facing towards the concrete can reduce uneven portions on the subsequent concrete wall.

In one embodiment of the invention, the anchor seal and/or closure cap are made so as to be connectable to the anchor hole by means of a bayonet lock. Alternatively, a latching connection is provided.

A bayonet lock is a connection in which at least one projection is guided in a corresponding counter-contour and can be brought by a rotating movement into the end position and locked there.

A latching connection is a detachable type of connection in which two elements can be detachably connected to one another in a predetermined position, namely by positive fit. At least one projection latches into a corresponding counter-contour by means of elastic deformation. A latching connection can be released again by another elastic deformation.

A particularly long lifespan with regard to the number of possible assembly and dismantling cycles is achieved by providing a bayonet lock for connecting the anchor seal and/or the closure cap to the anchor hole. A bayonet lock is a connection that is able to withstand large axial forces, which are caused, for example, by the anchor rod impacting projections on the inner circumference of an anchor seal when it is pushed through.

The latching connection for connecting the anchor seal and the closure cap with the anchor hole permits a particularly simple assembly and dismantling.

Moreover, providing a latching connection for connecting the closure cap with the anchor hole enables a particularly quick and simple release of the closure cap in the direction of the anchor hole axis, for example by knocking it out with a anchor rod.

In one embodiment of the invention, at least three flexible tongues are provided for the latching connection on the anchor seal and/or the closure cap, in particular three or four flexible tongues, preferably exactly three flexible tongues with an arc length of preferably 80° to 100° each, particularly preferably 90°, or exactly four flexible tongues with an arc length of preferably 50° to 70° each, particularly preferably 60°.

Flexible tongues are axial extensions separated by a gap which can be elastically deformed by applying a radial force at the free end of the flexible tongue, for example when a projection on the free end of a flexible tongue latches into a recess. The free end of a flexible tongue is the end of a flexible tongue separated from the rest of the component by gaps.

Tests have shown that at least three flexible tongues should be used in order to be able, on the one hand, to fix an anchor seal and/or closure cap in the anchor hole with sufficient firmness against axial forces, and on the other hand, to enable a simple detachability. Too many flexible tongues lead to an increased risk of individual flexible tongues breaking off during handling at the construction site. A rugged design is therefore required for a long lifespan. A simple assembly and dismantling of an anchor seal that is nevertheless capable of withstanding the axial forces occurring when an anchor rod is pushed through was accomplished with exactly three flexible tongues with an arc length of preferably 80° to 100° each, particularly preferably an arc length of 90°. A closure cap with an otherwise good holding force was caused to be knocked out with exactly four flexible tongues with an arc length of preferably 50° to 70° each, particularly preferably 60°.

In one embodiment of the invention, a projection is provided at the free end of the flexible tongues for the latching connection, preferably with a bevel of 40° to 50° to the jacket surface, particularly preferably a bevel of 45°, and/or preferably with a bevel of 30° to 60° at the free end of the flexible tongue, more preferably a bevel of exactly 45° or exactly 30°.

The bevel of 40° to 50° to the jacket surface serves for fixing the anchor seal and/or the closure cap in a correspondingly configured design. A particularly large holding force could be obtained with a bevel of 45°. The bevel of 30° to 60° at the free end of the flexible tongue enables a simple assembly because the anchor seal and/or the closure cap are centered due to the bevel when pushed into the anchor hole and because the force required for latching can be determined by the selection of the bevel angle. A small latching force facilitates the assembly, whereas a large latching force signals the latching action and thus the reaching of the end position more clearly to the user. In the case of the anchor seal, a bevel of 45°, and in the case of the closure cap, a 30° bevel at the free end of the flexible tongue has proved to be advantageous for assembly.

In one embodiment of the invention, at least one projection at the anchor seal and/or the closure cap is provided for the bayonet lock, in particular a radial projection, preferably exactly four projections, preferably with a distance of 90° to each other, preferably with an arc length of 15° to 20°, with 18° being particularly preferred.

The projection enables the connection of the anchor seal and/or of the closure cap with the anchor hole by means of a bayonet lock, wherein the projection can be brought by a rotary movement into the end position where it is able to absorb axial forces. Exactly four projections with an arc length of 15° to 20°, particularly preferably an arc length of 18°, have proved to be particularly advantageous because a higher number and width of the projections can make assembly more difficult and a lower number and width of the projections cannot absorb enough axial forces.

In one embodiment of the invention, the projection for the bayonet lock has an offset angled preferably 85° to 95° to the jacket surface, more preferably 90°, and/or tapers conically in the direction of the wall formwork.

Due to its angled position to the jacket surface, the offset enables an elastic deformation in the axial direction in the end position, whereby a contact pressure can be caused which requires a certain torque for releasing the bayonet lock. This torque should be selected to be large enough that the bayonet lock is capable of withstanding the usual external loads and still can be detached without much trouble during dismantling. The tapering of the projection in the direction of the wall formwork is advantageous in that the projection thus centers itself when it is pushed into the anchor hole.

In one embodiment of the invention, the anchor seal and/or the closure cap provide supporting webs and/or, at the inner edge facing towards the wall formwork, a bevel.

By providing supporting webs, an anchor seal and/or a closure cap can be manufactured with less material but the same strength. By means of a corresponding design of supporting webs, the elasticity of the flexible tongues for a latching connection can moreover be specifically modified, and in addition, a guide, for example for an anchor rod for a low-wear release of the latching connection of the closure cap, can be made possible.

A guide of the anchor rod for passing it in a low-wear manner through the anchor seal is made possible by a bevel on the inner edge facing towards the wall formwork.

In one embodiment of the invention, the anchor seal and/or the closure cap provide a support surface facing towards the wall formwork, preferably a ring support, and/or are embedded into the formwork facing on one or both sides of the formwork facing.

A support surface facing towards the wall formwork is advantageous in that a reproducible forming contour of the anchor seal and/or the closure cap in the concrete is made possible, whereby a concrete wall with a particularly high quality can be produced. A ring support causes a particularly precise and reproducible positioning of the anchor seal and/or the closure cap in the anchor hole.

A closure cap embedded into the formwork facing on one side of the formwork facing, i.e. a closure cap that is flush with the formwork facing surface, enables the production of a smooth concrete wall without any additional post-processing steps. If the closure cap were to protrude on the side facing towards the concrete, undesired recesses in the subsequent concrete wall would generally be produced.

Additionally, anchor seals embedded into the formwork facing on the side facing towards the concrete can be configured in such a way that anchor systems with a sheathing tube can also be sealed that cannot be sealed in a suitable manner with protruding anchor seals.

In one embodiment of the invention, the anchor seal provides a recess with an undercut, in particular C-shaped, preferably peripheral, in particular for accommodating a sealing lip.

A recess with an undercut enables a very firm and low-wear anchoring of a sealing means, in particular a sealing lip, for sealing an anchor rod in an anchor hole. A peripheral recess configured in a C-shape with an undercut moreover enables a particularly high degree of tightness of the interface between the anchor seal and the sealing means.

In one embodiment, the anchor seal comprises a sealing lip, preferably configured symmetrically to both sides of the formwork facing, for example trapezoidal, and/or provides a sealing lip that is manufactured as a mold-on part, in particular injection-molded into the recess of the anchor seal, preferably consisting of a softer material than the material of the anchor seal, more preferably of the materials TPE-O and/or TPEV.

A sealing lip as an additional sealing means between the anchor seal and the anchor rod for sealing the anchor rod against liquid concrete is advantageous in that the sealing lip can adapt flexibly to varying anchor rod diameters. This is of importance particularly if an anchor system with a conical anchor rod without sheathing tube is used and if the diameter of the anchor rod in the region of the anchor seal varies depending on the distance of the wall formworks.

Because the anchor rod has to be pushed through from both sides into a anchor seal in order to hold two opposite wall formworks by means of a single anchor system, a sealing lip configured symmetrically towards both sides of the formwork facing is advantageous in order to be able to seal anchor rods passed through from both sides equally well. A trapezoidal sealing lip has in this case proved to be particularly low-wear.

Providing a peripherally extending groove on both sides of the sealing lip in the transitional region to the recess in the anchor seal, where the sealing lip is anchored, brings about a large degree of movability of the sealing lip in both directions of the axis and a particularly high wear resistance.

By manufacturing the sealing lip as an injection-molded article, the manufacturing expenditure can be reduced over other shaping methods (turning or milling). Moreover, manufacturing expenditure can be reduced significantly further precisely in the case that the sealing lip is directly injection-molded into the recess of the anchor seal. Thus, the step of mounting the sealing lip into the recess of the anchor seal can be saved. At the same time, this enables the configuration of a recess with a particularly large undercut which is capable of causing a particularly great anchoring stability of the sealing lip, but which could otherwise (i.e. without injection-molding the sealing lip into the recess of the anchor seal) not be mounted.

A particularly high degree of adaptability of the sealing lip to the anchor rod diameter can be obtained by the sealing lip being produced from a softer material than the material of the anchor seal. A particularly high sealing performance and wear resistance was in this case achieved by the materials TPE-O and/or TPEV.

One embodiment of the invention provides an anchor hole provided in the formwork facing by an adapter, in particular with an extension of the adapter, which is adapted to the formwork facing length, along the anchor hole axis, preferably the same extension. Providing the adapter constitutes an independent invention which does not require providing a closure cap, which, however, can be combined advantageously with all of the aforementioned features individually or in any combination.

The opening in the formwork facing is adapted by means of a shaping process, for example milling, to the contour of the adapter that is, or is to supposed be, connected to the opening.

The replacement of the anchor seal and/or the closure cap leads to wear on the interfaces. In particular a latching connection or a bayonet lock requires structures for latching or accommodating, which generally wear down particularly fast. Without an adapter, this wear would occur on the opening in the formwork facing of the wall formwork, which would make the frequent replacement of the entire formwork facing necessary. By providing an anchor hole provided by an adapter, it is made possible that, instead of the formwork facing, only the adapter is to be replaced in case of wear and that thus the maintenance expenditure can be reduced in a particular degree.

On the one hand, a particularly rigid connection between the adapter and the anchor seal and/or the closure cap can be achieved and, on the other hand, uneven portions in the subsequent concrete wall can be avoided by an extension of the adapter, which is adapted to the formwork facing thickness, along the anchor hole axis. An adapter that ends flush with the formwork facing on both sides, i.e. given the same extension, makes a particularly great level of variability with respect to the configurability of an anchor seal and/or a closure cap possible. For example, a wall formwork with an embedded anchor seal and/or closure cap is thus made possible with which uneven portions in the subsequent concrete wall can generally be avoided. Furthermore, such a flush arrangement advantageously protects the corresponding edge of the formwork facing against damage, for example by inserting anchor rods.

One embodiment of the invention provides a single-part adapter or an adapter comprising at least two parts and/or a detachable connection of the adapter to an opening in the formwork facing, for example by means of a non-positive connection, particularly a screwed connection, preferably with a pitch of preferably greater than 1.0 mm, more preferably 1.2 mm, particularly preferably 1.4 mm and/or preferably smaller than 3.0 mm, more preferably smaller than 2.0 mm, particularly preferably smaller than 1.6 mm.

A single-part adapter is advantageous in that the adapter can be mounted from only one side of the formwork facing and that it comprises fewer parts as compared with a multi-part adapter.

An adapter comprising at least two parts enables the configuration of a detachable connection of the adapter to an opening in the formwork facing, which, as compared with a single-part adapter, makes a particularly large number of assembly and dismantling cycles possible, particularly in soft formwork facing material. A considerable advantage lies in the fact that it is possible, if necessary, to replace the part of the adapter provided on the concrete side without having to dismantle the second part, which, as a rule, does not have to be replaced or dismantled. This embodiment has proved its worth particularly in the case of formwork facings consisting of plastics.

Furthermore, using an adapter comprising at least two parts, detachable types of connection with the opening in the formwork facing can be configured which are capable of avoiding damage or increased wear to the formwork facing by the frequent replacement of damaged or worn adapters that would otherwise be caused by disconnecting non-detachable connections. Examples for disconnecting non-detachable connections are the fracturing of a predetermined breaking point of the shearing off of a seal by means of applying pressure to a knock-out bolt or a knock-out tube.

A non-positive connection of the adapter with the formwork facing is a particularly reliable and low-wear type of connection that can be realized particularly easily by means of a screwed connection. By providing a screwed connection with a pitch of preferably greater than 1.0 mm, more preferably 1.2 mm, particularly preferably 1.4 mm and/or preferably smaller than 3.0 mm, more preferably smaller than 2.0 mm, particularly preferably smaller than 1.6 mm, a self-locking action of the thread with a particularly large holding force can be brought about.

In one embodiment of the invention, at least a part of the adapter provides a radially extending projection, particularly a collar, preferably with the same collar diameter at at least two parts of the adapter, and/or an outer contour that is rotationally symmetric about the anchor hole axis.

Due to at least one part of the adapter with a radially extending projection, a positive connection of the adapter to the formwork facing, particularly in the region around the opening in the formwork facing, is possible. Preferably, at least two parts of the adapter each comprise a radially extending projection or collar. Then, the adapter can be connected to the formwork facing by flatly pressing an annular part of the formwork facing around the opening between the two projections. If at least two parts of the adapter have collars with the same diameter, a similarly large load resistance from both sides of the formwork facing can be effected.

A rotationally symmetric outer contour around the anchor hole axis means that the three-dimensional outer contour maps itself onto itself when rotated by any angle about the anchor hole axis. The outer contour considered in this case exclusively relates to the jacket surface, with geometry elements such as threads or inscriptions and engravings being excepted from this consideration.

By providing at least a part of the adapter with a rotationally symmetric outer contour, the realization of a detachable screwed connection of adapter parts is made possible. Damage to the formwork facing due to the assembly of the adapter, particularly in the case of providing an embedded adapter, can be avoided by at least one part of the adapter with a rotationally symmetric outer contour.

In an advantageous embodiment, the anchor hole, or the adapter providing the anchor hole, have at least one L-shaped groove, preferably on the inner circumference, for accommodating a bayonet lock, and/or a bevel on the side facing elements supporting the formwork facing, for latching a latching connection, preferably with a bevel angle of 30 to 60°, more preferably 40 to 50°, particularly preferably 45°.

At least one L-shaped groove permits the realization of a loss-proof but detachable attachment of a bayonet lock that is able to withstand high mechanical loads in the direction of the anchor hole axis. A particularly high locking strength in the end position against toques and forces from both sides of the formwork facing can be obtained by means of an embodiment in which the element accommodated by means of a bayonet lock rests against a support surface of the accommodating element, and the guide groove in the end position is configured in such a way that the projection guided therein of the accommodated element has to be deformed elastically in order to be able to arrive in the end position by means of a rotary movement. By means of exactly four L-shaped grooves spaced 90° apart, a good holding force could be obtained with a particularly small number of guide grooves.

The latching of an anchor seal and/or a closure cap can be made possible by a bevel on the inner edge of the anchor hole on the on the side facing elements supporting the formwork facing. For example, a projection on the free end of a flexible tongue can thus latch into the bevel. A particularly suitable holding force of a latching connection with simple detachability and good loss-proof properties was preferably obtained with a bevel angle of 30° to 60°, more preferably 40° to 50°, particularly preferably 45°. This embodiment makes passing an anchor rod through easier.

One embodiment of the invention provides a part of the adapter with one or more projections for a non-rotatable lock in the formwork facing, webs disposed in particular parallel to the anchor hole axis, preferably spaced by 15° to 90° from one another, more preferably by 15° to 30°, particularly preferably 15°, and/or one or more recesses for coupling a tool, particularly facing elements supporting the formwork facing, preferably spaced by 45° to 90° from one another, more preferably by 50° to 70°, particularly preferably 60°, such a recess preferably having a diameter of 4 mm to 6 mm, preferably 6 mm, as well as a depth of 1.5 mm to 2.5 mm, preferably 2.5 mm.

A part of the adapter with one or more projections for a non-rotatable lock in the formwork facing enables a particularly reliable connection of an anchor seal and/or the closure cap with a bayonet lock, and wear due to rotary movements of the adapter in the opening of the formwork facing is avoided. One or more webs running parallel to the anchor hole axis and extending radially have proved to be a particularly advantageous configuration of a non-rotationally symmetric outer contour for a non-rotatable lock in the formwork facing. A high resistance to rotation in the formwork facing can preferably be obtained with a spacing of the webs to one another of 45° to 90°, more preferably of 50° to 70°, particularly preferably 60°.

A particularly expedient, rapid assembly and dismantling of an adapter is made possible by a part of the adapter with one or more recesses for coupling a tool. Providing such recesses on the side facing elements supporting the formwork facing avoids uneven portions in the subsequent concrete wall. A particularly good coupling of a tool to the adapter was obtained with recesses with a spacing of preferably 45° to 90°, more preferably of 50° to 70°, particularly preferably 60°, such a recess preferably having a diameter of 4 mm to 6 mm, preferably 6 mm, as well as a depth of 1.5 mm to 2.5 mm, preferably 2.5 mm.

In one embodiment of the invention, the adapter and/or anchor seal and/or the closure cap is made of plastics, in particular polypropylene, and/or recesses or cavities are provided for reducing the body volume.

However, the features of this embodiment in principle only relate to the basic body, that is, for example, not the recess for anchoring a sealing lip of an anchor seal as well as the sealing lip of an anchor seal itself.

The use of plastic enables the employment of injection-molding methods for manufacturing an adapter and/or an anchor seal and/or a closure cap with a particularly small expenditure and unit costs. Moreover, plastics are particularly easy to remove from concrete after hardening. Moreover, the plastic material has a particularly high level of wear resistance.

By specifically inserting recesses or cavities for reducing the body volume, which leave only the structures required for function and strength, material can be saved, and thus the manufacturing expenditure can be reduced.

In one embodiment of the invention, the adapter on anchor points at the edge is configured in such a way that the adapter ends flush with the edge of the formwork, in particular due to a radial extension adapted to the opening in the formwork facing and the edge, preferably on the side facing towards the concrete.

The formwork edge is a boundary of the formwork facing that can be configured as a metal sheet, whose width corresponds to the thickness of the formwork facing.

Due to an adapter ending flush with the formwork edge, the attachment of anchor systems is made possible also on openings in the formwork facing of the wall formwork that are positioned in the vicinity of the formwork edge. By means of an adapter that ends flush with the edge of the formwork due to a radial extension adapted to the opening in the formwork facing and the edge, on the side facing towards the concrete, uneven portions on the subsequent concrete walls can be avoided.

Preferably, the adapter consists of exactly two parts in order to keep the number of parts small and to configure it to be replaceable in the above-described manner.

Another aspect of the invention relates to a wall formwork with a sealing system, in particular for closing an anchor hole of the wall formwork or for sealing an anchor rod in an anchor hole of the wall formwork, which comprises an anchor seal and one, generally several, closure caps and which provides an adapter strip, preferably embedded into the formwork facing, to which one or more anchor seals and/or one or more closure caps can be connected, preferably detachably connected, preferably by means of a latching connection and/or a bayonet lock.

An anchor hole is an opening in the wall formwork, i.e. an opening in the formwork facing and an opening in the elements supporting the formwork facing, which are made in such a way that an anchor rod can be pushed through them in order to produce a concrete wall. In this case, the opening can have different shapes, such as round, rectangular or polygonal.

For example, a wall formwork, particularly a wall formwork with an adapter strip, can have a rectangular opening in the formwork facing and round openings in the elements supporting the formwork facing, wherein the round openings can be covered by the rectangular opening.

Therefore, the adapter strip according to the invention can be configured in such a way that it fills, for example, a rectangular opening of the formwork facing and has one or more openings for pushing through anchor rods, wherein each opening in the adapter strip is disposed centered with regard to an opening in the elements supporting the formwork facing for pushing through anchor rods.

Compared with the prior art, the adapter strip according to the invention makes wall formworks possible having anchor holes that are disposed very close to each other, for the variable concrete component production with particularly little wear on the formwork facing, and thus a particularly small maintenance expenditure for the wall formwork. Given openings in the wall formwork that are disposed very close to one another, the construction space required for the assembly of, for example, the above-described adapters may not suffice, so that only the adapter strip according to the invention can be used and attached with the above-described advantages. If the openings in the wall formwork are close but still spaced in such a way that a plurality of individual adapters could be attached, the adapter strip according to the invention also in this case makes a particularly low assembly and dismantling expenditure possible as compared to individually attached adapters.

An adapter strip embedded into the formwork facing and made in such a way that anchor seals and/or closure caps can be detachably connected to the opening or the openings of the adapter strip by means of a latching connection and/or a bayonet lock makes possible the same advantageous effects that were analogously described with respect to the adapter according to claim 1 in the descriptions regarding the corresponding sub-claims.

In one embodiment of the invention, the adapter strip provides at least two recesses for attaching the adapter strip to the wall formwork, in particular on the elements supporting the formwork facing, preferably without perforation of the surface facing towards the concrete, and/or comprises at least one projection for pressing the formwork facing against and/or orienting the formwork facing in an axis relative to elements supporting the formwork, in particular on the top side and the bottom side of the adapter strip, preferably flush with the surface of the adapter strip facing towards the concrete, preferably with a slanted pressing surface and/or a pressing surface parallel to the formwork facing surface.

Due to the recesses, the adapter strip can be attached to the wall formwork particularly securely and reliably. For example, the recesses permit self-tapping screws to be screwed in without cracks, which would otherwise be produced by material displacement and reduce the strength and reliability of the attachment. Another advantage of the recesses for attaching the adapter strip is the guiding and self-centering effect when applying and attaching connection means, particularly screws. Recesses that do not perforate the surface on the side facing the concrete make it possible to produce a smooth concrete surface with a particularly high quality using one or two embedded adapter strips.

Due to at least one projection in the adapter strip, the attachment of the adapter strip to the wall formwork can simultaneously cause the formwork facing to be pressed against elements supporting the formwork facing, whereby uneven portions of the formwork facing are avoided and the manufacture of a smooth concrete surface with a particularly high quality can be made possible.

By means of a projection on the top side and/or the bottom side of the adapter strip, a particularly large and elongate pressing surface can be produced, whereby uneven portions can be avoided in a particularly large part of the formwork facing. Additionally, a projection that is configured flush with the surface of the adapter strip facing the surface permits the production of a particularly smooth concrete surface in the case of embedded adapter strips. Using slanted pressing surfaces, the adapter strip can be cause to self-center in the formwork facing during attachment, whereas pressing surfaces configured to be parallel to the formwork facing surface enable a particularly exact positioning of the adapter strip in the formwork facing, for example in order to dispose an embedded adapter strip flush with the formwork facing.

In one embodiment of the invention, the adapter strip comprises at least two parts, in particular strip-shaped parts, preferably by means of a positive connection, and/or provides recesses for volume reduction.

Due to an adapter strip comprising at least two parts, the length of the adapter strip can be adapted to the size of the wall formwork or of the region to be covered by an adapter strip with a plurality of openings in the wall formwork. Furthermore, individual, short parts of an adapter strip can be produced with significantly less effort and simpler tools than the entire, long adapter strip in a single piece. By connecting the strip-shaped parts by a positive connection, the gap on the connections can be reduced, and thus, uneven portions in the subsequent concrete wall can be avoided.

Because anchor holes are typically disposed in a row, a strip-shaped configuration is particularly space-saving.

In one embodiment, such a positive connection between two strip-shaped parts of an adapter are realized by means of mutually engaging round extensions and recesses with an undercut as well as a stop. In this case, the rounded portion includes a circular angle section of greater than 180° and less than 270°. A peripheral contact edge enables a defined stop in the direction of the anchor hole axis while connecting the strip-shaped parts.

The invention moreover relates to a wall formwork with anchor holes, which is detachably connected both to at least one anchor seal as well as to at least one closure cap. This configuration is the result of the insight that the number of the anchor systems used should be advantageously adapted to the respective load-related situation in order to minimize the number of anchor systems that are to be assembled and dismantled. Therefore, anchor holes that are then not required are closed with closure caps. The assembly and dismantling expenditure for wall formworks is thus kept small. Subsequent to an assembly, anchor rods have been pushed through all anchor holes that are detachably connected to anchor seals. Subsequent to dismantling, all anchor holes of the wall formwork are detachably connected to either an anchor seal or to a closure cap. Given the load-related situation being the same, this wall formwork can therefore be reinserted immediately. If the wall formwork is to be equal to a different load-related situation, one or more anchor seals are accordingly replaced with closure caps or reversed, in order to prepare the wall formwork in a suitable manner. The expenditure for such a replacement is significantly lower than the assembly and dismantling of anchor systems.

Advantageous embodiments of the invention are explained in more detail below.

FIG. 1 shows the side of the wall formwork 1 facing towards the concrete, with the formwork facing 6 and the anchor holes 2.

FIG. 2 shows a wall formwork 1 with anchor holes 2 seen from the side facing away from the concrete, with the formwork facing 6 and elements 7 supporting the formwork facing.

In FIG. 3, two opposite wall formworks 1 are retained by means of anchor systems 8 in order to provide a hollow form for a concrete wall. The anchor systems comprise anchor rods 3 with and without a sheathing tube 9 and cone 10, with a conical anchor rod 3 b being used in the anchor system without a sheathing tube 9 and cone 10, and a anchor rod with an external thread 3 a being used in the anchor system with a sheathing tube 9 and cone 10.

FIG. 4 shows an exploded view of an advantageous embodiment of the sealing system according to the invention with anchor seals 4 for sealing anchor systems 8 with and without a sheathing tube 9 and cone 10, as well as a closure cap 5, wherein the anchor seals 4 and the closure cap 5 are made in such a way that they can be directly connected to the anchor hole 2. The two-part adapter 11 in this embodiment provides the anchor hole 2 and is detachably connected to an opening in the formwork facing 12 a. In this embodiment, the adapter 11, on both sides, is embedded into the formwork facing 6 flush with the formwork facing surface. The closure cap 5 and the embedded anchor seal 4 a are embedded, flush with the formwork facing surface, into the formwork facing 6 on the side facing towards the concrete. If the closure cap 5 is used, this enables the production of a smooth concrete wall, and if an embedded anchor seal 4 a is used, this enables the use of anchor systems with a sheathing tube 9 and cone 10, which encases an anchor rod with an external thread 3 a. The protruding anchor seal 4 b comprises a sealing lip 13 and enables the sealing of a conical anchor rod 3 b of an anchor system without a sheathing tube 9 and cone 10.

FIG. 5 a shows the bottom view of an embodiment of the closure cap 5 in which four flexible tongues 14 with a 60° arc length each are configured for the latching connection. The closure cap is manufactured from polypropylene by means of an injection-molding method and provided with recesses 33 for material reduction.

FIG. 5 b shows a sectional view of FIG. 5 a of the closure cap 5, in which a support surface 17 facing towards the wall formwork and a projection 16 on the free end of the flexible tongues 15 are provided for a latching connection. The projection 16 at the free end of the flexible tongues 15 has a 45° bevel to the jacket surface and a 60° bevel to the free end of the flexible tongue. Due to correspondingly designed supporting webs 17, the elasticity of the flexible tongues 14 for a latching connection is set, and in addition serves as a guide for an anchor rod, which can thus be used as a tool for a low-wear release of the latching connection of the closure cap.

FIG. 6 a shows the bottom view of an embodiment of a protruding anchor seal 4 c with a latching connection and without a sealing lip, in which three flexible tongues 14 with a 90° arc length each are configured for the latching connection. No embodiment embedded into the formwork facing, nor a sealing lip are provided in this anchor seal, because the same anchor rod diameter is provided as a matter of principle in the region of the anchor seal, in particular in the case of multi-part, in particular conical, anchor rods without a sheathing tube and therefore the gap between the anchor rod and the anchor seal can be kept so small, even without a sealing lip, that a bleed-out of concrete can be avoided. Because the anchor rod, when it is pushed through the anchor seal 4 c, meets with no obstacles, for example in the form of a sealing lip, on which the anchor rod could become stuck, a latching connection suffices for a loss-proof and detachable connection to the anchor hole in the case of the anchor seal 4 c. The anchor seal 4 c is manufactured from polypropylene by means of an injection-molding method.

In one embodiment, such anchor seals are configured in different ways. The different configurations are adapted, in particular, to different diameters of anchor rods. Preferably, the anchor seals in that case differ visually, in particular with respect to color, in order to facilitate and expedite the correct choice to thus facilitate handling.

FIG. 6 b shows a sectional view of FIG. 6 a of the anchor seal 4 c, in which a support surface 17 facing towards the wall formwork and a projection 16 on the free end of the flexible tongues 15 are provided for a latching connection. The projection 16 at the free end of the flexible tongues 15 has a 45° bevel to the jacket surface and also a 45° bevel to the free end of the flexible tongue. Preferably, the anchor seal is configured conically in such a way that it can be removed from concrete in an improved manner.

FIG. 7 a shows the bottom view of an embodiment of a protruding anchor seal 4 b with a sealing lip 13, in which four radial projections 18 with a 90° spacing from one another and with an arc length of 18° each are formed for the bayonet lock. Due to correspondingly configured supporting webs 21 and recesses 33, the anchor seal 4 c has a high level of strength and small material volume. Advantageously, the high strength reliably and permanently serves for guiding the anchors.

FIG. 7 b shows a sectional view of FIG. 7 a of the protruding anchor seal 4 b with a sealing lip 13, in which a support surface 17 facing towards the wall formwork and projections, each of which comprises an offset 19 angled to the jacket surface by 90° and tapers conically in the form of a bevel 20 in the direction of the wall formwork, are provided for the bayonet lock. Due to the distance between the support surface 17 and offset 19 being smaller than in the corresponding guide of the anchor hole to be connected, an elastic deformation of the projection in the axial direction in the end position is made possible, whereby a contact pressure can be caused that locks the anchor seal 4 c by means of a rotation into the end position of the bayonet lock.

A bevel on the inner edge 22 facing towards the wall formwork makes a guide of the anchor rod possible, and thus enables it to be pushed through the anchor seal in a particularly low-wear and particularly simple manner.

The protruding anchor seal 4 b with a sealing lip 13 comprises, in the protruding portion, a peripheral, C-shaped recess 23 with an undercut into which the sealing lip material TPE-O and/or TPEV was introduced by means of an injection-molding method, thus anchoring the sealing lip 13. With the exception of the sealing lip 13, the anchor seal 4 b is manufactured from polypropylene by means of an injection-molding method. The portion of the sealing lip 13 protruding from the recess 23 is configured in a trapezoidal manner, symmetrical to both sides of the formwork facing. In one version, the sealing lip can have been molded on.

What is not depicted in the FIGS. 7 a and 7 b is the peripheral groove, which is provided in an advantageous embodiment, on both sides of the sealing lip 13 in the transitional region to the C-shaped recess 23 for obtaining a particularly high level of flexibility and wear resistance for loads from both directions of the anchor hole axis.

FIG. 8 a shows the top view of the adapter disc 24, i.e. the portion of the two-part adapter 11 facing towards the concrete. For the latching connection and the bayonet lock, a support surface 25 facing away from the wall formwork is configured which is interrupted by the entrances to the L-shaped grooves 26 for the bayonet lock. In addition, the adapter disc 24 comprises a radially extending projection or collar 27 a that ends flush with the formwork facing 6.

FIG. 8 b shows a sectional view of FIG. 8 a of the adapter disc 24. The support surface 25 facing away from the wall formwork is configured in such a way that a seal, which is flush with the formwork facing surface and embedded, with an adapter 11 and a closure cap 5 or with an adapter 11 with an anchor seal 4 a is made possible.

For the bayonet lock, four L-shaped grooves 26 for accommodating corresponding radial projections 18 are provided on the inner circumference of the adapter disc 24. Thus, the embedded anchor seal 4 a or the protruding anchor seal 4 b with the sealing lip can be brought into the end position by a pushing movement along the anchor hole axis in the direction of the elements supporting the formwork facing, followed by a clockwise rotary movement, and in the process locked by an elastic deformation of the radial projection 18.

For the latching connection, a 45° bevel 28 for latching a projection 16 of the closure cap 5 or of the protruding anchor seal 4 c with the latching connection is provided on the inner circumference of the adapter disc 24, on the side facing the elements 7 supporting the formwork facing.

FIG. 8 c shows an isometric view of the adapter disc 24 from the FIGS. 8 a and b. The adapter disc 24 has an outer contour configured to be rotationally symmetric about the anchor hole axis, and is connected non-positively with the locking ring 30 by means of a thread 29 a with a pitch of 1.5 mm. The adapter disc 24 is manufactured from polypropylene by means of an injection-molding method and comprises recesses 33 for material reduction.

FIG. 9 a shows the bottom view of the locking ring 30, i.e. the part of the two-part adapter 11 facing the elements 7 supporting the formwork facing. In analogy to the adapter disc 24, the locking ring 30 comprises a radially extending projection or collar 27 b, which ends flush with the formwork facing 6 and has the same diameter as the collar 27 a of the adapter disc 24.

For coupling a tool, six recesses 31 spaced 60° from one another are disposed on the collar on the side facing towards the elements 7 supporting the formwork facing. The recesses 31 have a diameter of 6 mm and a depth of 2.5 mm.

FIG. 9 b shows the top view of the locking ring 30, with projections or webs 32 being disposed parallel to the anchor hole axis with a spacing of 15° from one another for a non-rotatable lock in the formwork facing. During assembly, the locking ring is pressed against the corresponding recess into the formwork facing 6 in such a way that the webs 32 penetrate into the formwork facing and the ring surface of the collar 27 b facing the concrete or the formwork facing rests flat against the formwork facing.

FIG. 9 c shows an isometric view of the locking ring 30 from the FIGS. 9 a and 9 b.

The adapter 11 providing the anchor hole, which is attached to an opening in the formwork facing 12 a by connecting the adapter disc 24 and the locking ring 30, is embedded on both sides in the formwork facing 6 flush with the surface of the formwork facing 6, that is, the width of the adapter 11 matches the width of the formwork facing.

Due to the outer contour of the adapter disc 24, which is rotationally symmetric about the anchor hole axis, and the outer contour of the locking ring 30, which is not rotationally symmetric due to the webs 32, an assembly of the two-part adapter 11 is made possible which provides that the locking ring be pressed into the formwork facing from the side facing away from the concrete, followed by screwing the adapter disc 24 onto the locking ring 30 until the formwork facing is non-positively and positively, but detachably, connected to the adapter by means of the self-locking thread 29 a, 29 b. Due to the rotationally symmetric outer contour of the adapter disc 24 in the round recess in the formwork facing provided therefor, the adapter disc 24 can be screwed, without any damage to the formwork facing, onto the thread 29 b in such a way that the adapter disc 24 is embedded flush with the surface of the formwork facing 6 and, additionally, rests, also flush, against the radially peripheral interface to the formwork facing, whereby uneven portions in the subsequent concrete component are avoided.

FIG. 10 shows an exploded view of an advantageous embodiment of the sealing system according to the invention on anchor points at the edge. The two-part anchor edge location adapter 34 comprises the locking ring 30 and a radial extension 35, which ends flush with the edge of the formwork and is adapted to the opening in the formwork facing 12 b that is close to the edge of the formwork and to the edge, on the side of the adapter disc of the anchor edge location adapter 34 facing towards the concrete. During the assembly of the anchor edge location adapter 34, due to the non-rotationally symmetric outer contour of the adapter disc of the anchor edge location adapter 34, the adapter disc is first inserted into the opening in the formwork facing 12 b from the side facing towards the concrete and then, the locking ring 30 is screwed on, with the webs 32 producing a peripheral groove in the formwork facing 6. A non-rotatable lock is in this case brought about by the positive fit of the non-rotationally symmetric adapter disc of the anchor edge location adapter 34. Finally, the part of the locking disc 30 protruding over the edge of the formwork facing is cut off.

FIG. 11 shows an exploded view of an advantageous embodiment of the sealing system according to the invention with an adapter strip 36 that is embedded into the formwork facing 6. The adapter strip 36 fills a rectangular opening of the formwork facing 12 c and has several openings or anchor holes 2 for pushing through anchor rods 3, wherein FIG. 11 does not illustrate that each opening or each provided anchor hole 2 in the adapter strip is disposed centered with regard to an opening in the elements 7 supporting the formwork facing for pushing through anchor rods 3. In the openings or provided anchor holes 2 of the adapter strip 36, anchor seals 4 and/or closure caps 5 can be detachably connected by means of a latching connection and/or a bayonet lock.

The adapter strip 36 is positively assembled from two strip-shaped parts 37 a, 37 b and screwed to the elements 7 supporting the formwork facing by means of screws. More than two strip-shaped parts are also possible. A possible alternative to an attachment by means of screws is an attachment by means of clips or by gluing.

FIG. 12 b shows a strip-shaped part 37 a of the adapter strip 36 from FIG. 11. The positive fit between the strip-shaped parts 37 a and 37 b is realized by means of mutually engaging round extensions and recesses with an undercut 43, as well as a defined stop 38 in the direction of the anchor hole axis. With the exception of the anchor edge hole, two recesses 39 with the function of a lead hole are provided for attachment by screwing in the strip-shaped part 37 for each opening or each provided anchor hole 2.

FIG. 12 b shows a sectional view of FIG. 12 a of the adapter strip 36. The recesses 39 do not perforate the surface 40 facing towards the concrete. Projections on the top side and the bottom side of the adapter strip 36 for pressing the formwork facing 6 against elements 7 supporting the formwork facing comprise slanted pressing surfaces 41 and pressing surfaces 42 parallel to the surface 40 or formwork facing surface facing towards the concrete. 

1. A wall formwork with a sealing system, in particular for closing an anchor hole of the wall formwork or for sealing an anchor rod in an anchor hole of the wall formwork, comprising an anchor seal and a closure cap, wherein the anchor seal and the closure cap can be detachably connected to the anchor hole, the closure cap is directly connectable to the anchor hole, the anchor seal and/or the closure cap can be connected to the anchor hole by means of a bayonet lock or a latching connection, and the anchor hole being provided by an adapter, which comprises at least two parts and/or can be detachably connected to an opening in the formwork facing.
 2. A wall formwork with a sealing system, in particular for closing an anchor hole of the wall formwork or for sealing an anchor rod in an anchor hole of the wall formwork, comprising an anchor seal and a closure cap, wherein the anchor seal and the closure cap can be detachably connected to the anchor hole.
 3. The wall formwork according to claim 2, wherein the closure cap is directly connectable to the anchor hole.
 4. The wall formwork according to claim 2, wherein the anchor seal and/or the closure cap can be connected to the anchor hole by means of a bayonet lock or a latching connection.
 5. The wall formwork according to claim 2, wherein at least three flexible tongues are provided on the anchor seal and/or the closure cap for the latching connection, in particular three or four flexible tongues, preferably exactly three flexible tongues with an arc length of preferably 80° to 100° each, particularly preferably 90°, or exactly four flexible tongues with an arc length of preferably 50° to 70° each, particularly preferably 60°.
 6. The wall formwork according to claim 2, wherein a projection is provided at the free end of the flexible tongues for the latching connection, preferably with a bevel of 40° to 50° to the jacket surface, particularly preferably a bevel of 45°, and/or preferably with a bevel of 30° to 60° at the free end of the flexible tongue, more preferably a bevel of exactly 45° or exactly 30°.
 7. The wall formwork according to claim 2, wherein at least one projection at the anchor seal and/or the closure cap is provided for the bayonet lock, in particular a radial projection, preferably exactly four projections, preferably with a distance of 90° to each other, preferably with an arc length of 15° to 20°, particularly preferably 18°.
 8. The wall formwork according to claim 2, wherein the projection for the bayonet lock has an offset angled preferably 85° to 95° to the jacket surface, more preferably 90°, and/or tapers conically in the direction of the wall formwork.
 9. The wall formwork according to claim 2, wherein the anchor seal and/or the closure cap provide supporting webs and/or, at the inner edge facing towards the wall formwork, a bevel.
 10. The wall formwork according to claim 2, wherein the anchor seal and/or the closure cap provide a support surface facing towards the wall formwork, preferably a ring support, and/or are embedded into the formwork facing on one or both sides of the formwork facing.
 11. The wall formwork according to claim 2, wherein the anchor seal provides a recess with an undercut, in particular C-shaped, preferably peripheral.
 12. The wall formwork according to claim 2, wherein the anchor seal comprises a sealing lip, preferably configured symmetrically to both sides of the formwork facing, for example trapezoidal, and/or the sealing lip is manufactured as an injection-molded part, preferably consisting of a softer material than that of the anchor seal, more preferably of TPE-O and/or TPEV.
 13. The wall formwork according to claim 2, wherein the anchor hole is provided by an adapter.
 14. The wall formwork according to claim 2, wherein the anchor hole comprises at least one L-shaped groove for accommodating a bayonet lock, and/or a bevel on the side facing elements supporting the formwork facing, for latching a latching connection.
 15. The wall formwork according to claim 2, wherein the adapter has a single-part structure or comprises at least two parts and/or can be detachably connected to an opening in the formwork facing, for example by means of a non-positive connection, particularly a screwed connection, preferably with a pitch of preferably greater than 1.0 mm, more preferably 1.2 mm, particularly preferably 1.4 mm and/or preferably smaller than 3.0 mm, more preferably smaller than 2.0 mm, particularly preferably smaller than 1.6 mm.
 16. The wall formwork according to claim 2, wherein at least one part of the adapter provides a radially extending projection, particularly a collar, and/or an outer contour that is rotationally symmetric about the anchor hole axis.
 17. The wall formwork according to claim 2, wherein a part of the adapter comprises one or more projections for a non-rotatable lock in the formwork facing, webs disposed in particular parallel to the anchor hole axis, and/or one or more recesses for coupling a tool, particularly facing elements supporting the formwork facing, preferably spaced by 45° to 90° from one another, more preferably by 50° to 70°, particularly preferably 60°.
 18. The wall formwork according to claim 2, wherein the adapter and/or anchor seal and/or the closure cap are made of plastics, in particular polypropylene, and/or provide recesses for reducing the body volume.
 19. The wall formwork according to claim 2, wherein the adapter, on anchor points at the edge, ends flush with the edge of the formwork, in particular due to a radial extension adapted to the anchor hole and the edge, preferably on the side facing towards the concrete.
 20. A wall formwork with a sealing system, in particular for closing an anchor hole of the wall formwork or for sealing an anchor rod in an anchor hole of the wall formwork, which comprises an anchor seal and one, generally several, closure caps, in particular according to claim 2, comprising an adapter strip, preferably embedded into the formwork facing, to which one or more anchor seals and/or one or more closure caps can be connected, in particular detachably connected, preferably by means of a latching connection and/or a bayonet lock.
 21. The wall formwork according to claim 20, comprising at least two recesses for attachment to the wall formwork, preferably without perforation of the surface facing towards the concrete, and/or at least one projection for pressing the formwork facing against elements supporting the formwork, in particular on the top side and/or bottom side of the adapter strip, preferably flush with the surface of the adapter strip facing towards the concrete, preferably with a slanted pressing surface and/or a pressing surface parallel to the formwork facing surface.
 22. The wall formwork according to claim 20, wherein the adapter strip comprises at least two parts, in particular strip-shaped parts, preferably positively connected and/or with recesses for volume reduction.
 23. (canceled) 